This is not a final draft so any comments are welcome! I have an image but I'm not sure where to put the citation. Link here: http://scp-sandbox-3.wikidot.com/doctorphenonenon
SCP-████ is a tie-in SCP I have not written yet.Note: Please don't make your comment, "The idea is boring". If you feel this way, give suggestions on how to make it more interesting.

Note: I correct the given mistake only once. If you do not use the metric system, I will only make a single comment about it, even if it appears again in the rest of the article. If the draft has many language problems, I will only correct the most glaring ones.

SCP-XXXX is to be directly observed at least once a week for physical changes and to be under video surveillance at all times in the event of a behavioral change.

Saying that something should be monitored at all times means that you have some poor bastard keep their eyes on an object 24 hours a day, maybe in shifts with other people if they're lucky. Think about how many man-hours that would take. If the Foundation does its job properly, it shouldn't be able to break out of the containment chamber, and the constant monitoring wouldn't be necessary.

The amount of times ''the pit'' is mentioned is really distracting while reading:

D-class personnel are to be used when data collections necessitates a person to enter the pit. Only Researchers with Level 3 clearance and above are allowed to order expeditions into the pit. The researcher must monitor the expedition from the rim of the pit until all members of the expedition are out of the pit.

If SCP-XXXX is observed to begin to leave the pit, the area is to be evacuated and SCP-XXXX is to be observed by Foundation aircraft until it begins digging a new pit. Once SCP-XXXX has completed it's pit and ceased movement, research personnel may resume
activities near the new pit.

Try to keep your sentences concise with as little fluff text as possible:

''In case of SCP-XXXX abandoning the pit in order to create a new instance, the area is to be evacuated and remotely monitored by aircraft until digging starts. Once complete, personnel may resume activity in the new location.''

The Foundation has decided to feed SCP-XXXX cows rather than risk it relocating to find food. Generally SCP-XXXX ceases activity after being fed and the pit can be entered safely.

Wait, so we didn't actually contain this thing? Why not? It's a larvae, that shouldn't be hard.

So the concept is overused, akin to a monster manual entry. Why does this thing exist? Why does it have these properties? Where did it come from? What makes it different story-wise from any other monster already on the mainlist?

The most glaring issue is that the Foundation isn't doing its job. There's no reason the Foundation, which contains objects, would just let it stay where it is, especially because it might become exponentially more dangerous when it eventually matures.

The bottom line here is that just describing an object and have it kill people is not nearly enough to create a successful article on the site. Articles need something more, a reason for the reader to care.